Web-based application TrackThis is a veritable Swiss Army knife of package tracking with the ability to track packages from thirteen different carriers and update you in six different ways.

Enter a tracking number into TrackThis and assign it a nickname—like Nick's Naughty Valentine Box 'o Fun—and TrackThis automatically detects if the tracking number is from one of the thirteen carriers it supports. The webapp recognizes track numbers from FedEx, UPS, USPS, and all the way to the freight company CEVA and the international carriers like Canada Post and UK City Link.

Equally as impressive as its roster of carriers is the number of ways it can update you. TrackThis can show updates through its website, or send you updates through email, SMS, RSS, Twitter, or even Facebook messages. So if you really want to see where your mailed item is every step of the way, there's little chance you'll be left in the dark. TrackThis is a free service, but does require you to use a Google, OpenID or other compatible service for login. Thanks zyzzva!